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EP 3 756 036 A1

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(43) Date of publication: 30.12.2020 Bulletin 2020/53 (21) Application number: 19757083.1 (22) Date of filing: 19.02.2019

(51) International Patent Classification (IPC):  G02B 5/26(2006.01) B32B 15/08(2006.01) B32B 38/00(2006.01) G02B 5/08(2006.01) B60R 13/04(2006.01) (86) International application number: PCT/IB2019/051339 (87) International publication number: WO 2019/162834 (29.08.2019 Gazette 2019/35)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 20.02.2018 US 201815899457 (71) Applicant: 3M Innovative Properties Company Saint Paul, Minnesota 55133-3427 (US)

(72) Inventors: FRANKEL, Joan M. Saint Paul, Minnesota 55133-3427 (US) HAGEN, Kevin D. Saint Paul, Minnesota 55133-3427 (US) JOHNSON, Michael A. Saint Paul, Minnesota 55133-3427 (US) NORTH, Diane Saint Paul, Minnesota 55133-3427 (US) PHIPPS, James A. Saint Paul, Minnesota 55133-3427 (US) SHERMAN, Audrey A. Saint Paul, Minnesota 55133-3427 (US) TAI, Huiwen Saint Paul, Minnesota 55133-3427 (US) (74) Representative: Vossius & Partner Patentanwälte Rechtsanwälte mbB  Siebertstrasse 3 81675 München 81675 München (DE)